./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor686767670 <...> Warning: Permanently added '10.128.1.200' (ED25519) to the list of known hosts. execve("./syz-executor686767670", ["./syz-executor686767670"], 0x7ffc8a3a9430 /* 10 vars */) = 0 brk(NULL) = 0x55555e4d9000 brk(0x55555e4d9d00) = 0x55555e4d9d00 arch_prctl(ARCH_SET_FS, 0x55555e4d9380) = 0 set_tid_address(0x55555e4d9650) = 5865 set_robust_list(0x55555e4d9660, 24) = 0 rseq(0x55555e4d9ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor686767670", 4096) = 27 getrandom("\x6d\x20\xd9\xd8\xf5\x8d\x0f\x03", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555e4d9d00 brk(0x55555e4fad00) = 0x55555e4fad00 brk(0x55555e4fb000) = 0x55555e4fb000 mprotect(0x7fcab65fc000, 16384, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5866 attached , child_tidptr=0x55555e4d9650) = 5866 [pid 5866] set_robust_list(0x55555e4d9660, 24) = 0 [pid 5865] openat(AT_FDCWD, "/sys/kernel/debug/x86/nmi_longest_ns", O_WRONLY|O_CLOEXEC) = 3 [pid 5865] write(3, "10000000000", 11) = 11 [pid 5865] close(3) = 0 [pid 5865] openat(AT_FDCWD, "/proc/sys/kernel/hung_task_check_interval_secs", O_WRONLY|O_CLOEXEC) = 3 [pid 5865] write(3, "20", 2) = 2 [pid 5865] close(3) = 0 [pid 5865] openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_kallsyms", O_WRONLY|O_CLOEXEC) = 3 [pid 5865] write(3, "1", 1) = 1 [pid 5865] close(3) = 0 [pid 5865] openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_harden", O_WRONLY|O_CLOEXEC) = 3 [pid 5865] write(3, "0", 1) = 1 [pid 5865] close(3) = 0 [pid 5865] openat(AT_FDCWD, "/proc/sys/kernel/kptr_restrict", O_WRONLY|O_CLOEXEC) = 3 [pid 5865] write(3, "0", 1) = 1 [pid 5865] close(3) = 0 [pid 5865] openat(AT_FDCWD, "/proc/sys/kernel/softlockup_all_cpu_backtrace", O_WRONLY|O_CLOEXEC) = 3 [pid 5865] write(3, "1", 1) = 1 [pid 5865] close(3) = 0 [pid 5865] openat(AT_FDCWD, "/proc/sys/fs/mount-max", O_WRONLY|O_CLOEXEC) = 3 [pid 5865] write(3, "100", 3) = 3 [pid 5865] close(3) = 0 [pid 5865] openat(AT_FDCWD, "/proc/sys/vm/oom_dump_tasks", O_WRONLY|O_CLOEXEC) = 3 [pid 5865] write(3, "0", 1) = 1 [pid 5865] close(3) = 0 [pid 5865] openat(AT_FDCWD, "/proc/sys/debug/exception-trace", O_WRONLY|O_CLOEXEC) = 3 [pid 5865] write(3, "0", 1) = 1 [pid 5865] close(3) = 0 [pid 5865] openat(AT_FDCWD, "/proc/sys/kernel/printk", O_WRONLY|O_CLOEXEC) = 3 [pid 5865] write(3, "7 4 1 3", 7) = 7 [pid 5865] close(3) = 0 [pid 5865] openat(AT_FDCWD, "/proc/sys/kernel/keys/gc_delay", O_WRONLY|O_CLOEXEC) = 3 [pid 5865] write(3, "1", 1) = 1 [pid 5865] close(3) = 0 [pid 5865] openat(AT_FDCWD, "/proc/sys/vm/oom_kill_allocating_task", O_WRONLY|O_CLOEXEC) = 3 [pid 5865] write(3, "1", 1) = 1 [pid 5865] close(3) = 0 [pid 5865] openat(AT_FDCWD, "/proc/sys/kernel/ctrl-alt-del", O_WRONLY|O_CLOEXEC) = 3 [pid 5865] write(3, "0", 1) = 1 [pid 5865] close(3) = 0 [pid 5865] openat(AT_FDCWD, "/proc/sys/kernel/cad_pid", O_WRONLY|O_CLOEXEC) = 3 [pid 5865] write(3, "5866", 4) = 4 [pid 5865] close(3) = 0 [pid 5865] kill(5866, SIGKILL) = 0 [pid 5866] +++ killed by SIGKILL +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5866, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=0} --- unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5867 attached , child_tidptr=0x55555e4d9650) = 5867 [pid 5867] set_robust_list(0x55555e4d9660, 24) = 0 [pid 5867] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5867] getppid() = 0 [pid 5867] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5867] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5867] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5867] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5867] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5867] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5867] unshare(CLONE_NEWNS) = 0 [pid 5867] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5867] unshare(CLONE_NEWIPC) = 0 [pid 5867] unshare(CLONE_NEWCGROUP) = 0 [pid 5867] unshare(CLONE_NEWUTS) = 0 [pid 5867] unshare(CLONE_SYSVSEM) = 0 [pid 5867] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5867] write(3, "16777216", 8) = 8 [pid 5867] close(3) = 0 [pid 5867] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5867] write(3, "536870912", 9) = 9 [pid 5867] close(3) = 0 [pid 5867] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5867] write(3, "1024", 4) = 4 [pid 5867] close(3) = 0 [pid 5867] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5867] write(3, "8192", 4) = 4 [pid 5867] close(3) = 0 [pid 5867] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5867] write(3, "1024", 4) = 4 [pid 5867] close(3) = 0 [pid 5867] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5867] write(3, "1024", 4) = 4 [pid 5867] close(3) = 0 [pid 5867] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5867] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5867] close(3) = 0 [pid 5867] getpid() = 1 [pid 5867] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<) = 0 [pid 5867] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5890 attached [pid 5890] set_robust_list(0x55555e4d9660, 24) = 0 [pid 5890] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5867] <... clone resumed>, child_tidptr=0x55555e4d9650) = 3 [pid 5890] <... prctl resumed>) = 0 [pid 5890] setpgid(0, 0) = 0 [pid 5890] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5890] write(3, "1000", 4) = 4 [pid 5890] close(3) = 0 [pid 5890] read(200, executing program 0x7ffc5c88d4c0, 1000) = -1 EAGAIN (Resource temporarily unavailable) [pid 5890] write(1, "executing program\n", 18) = 18 [pid 5890] socket(AF_NETLINK, SOCK_RAW, NETLINK_NETFILTER) = 3 [pid 5890] sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\x14\x00\x00\x00\x10\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x0a\x20\x00\x00\x00\x00\x0a\x01\x03\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\xff\xfd\x09\x00\x01\x00\x73\x79\x7a\x30\x00\x00\x00\x00\x40\x00\x00\x00\x03\x0a\x01\x02\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x09\x00\x03\x00\x73\x79\x7a\x32\x00\x00\x00\x00\x14\x00\x04\x80\x08\x00\x02\x40\x32\x65\x8a\xeb\x08\x00\x01\x40"..., iov_len=204}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 204 [pid 5890] write(200, "\xaa\xaa\xaa\xaa\xaa\xaa\xff\xff\xff\xff\xff\xff\x08\x00\x45\xec\x00\x28\x00\x00\x00\x00\x00\x06\xb9\xe5\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x4e\x29\x44\x43\x42\x41\x44\x43\x42\x41\x50\x16\x00\x01\x54\x7c\x00\x20", 54) = 54 [pid 5890] close(3) = 0 [pid 5890] close(4) = -1 EBADF (Bad file descriptor) [pid 5890] close(5) = -1 EBADF (Bad file descriptor) [pid 5890] close(6) = -1 EBADF (Bad file descriptor) [pid 5890] close(7) = -1 EBADF (Bad file descriptor) [pid 5890] close(8) = -1 EBADF (Bad file descriptor) [pid 5890] close(9) = -1 EBADF (Bad file descriptor) [pid 5890] close(10) = -1 EBADF (Bad file descriptor) [pid 5890] close(11) = -1 EBADF (Bad file descriptor) [pid 5890] close(12) = -1 EBADF (Bad file descriptor) [pid 5890] close(13) = -1 EBADF (Bad file descriptor) [pid 5890] close(14) = -1 EBADF (Bad file descriptor) [pid 5890] close(15) = -1 EBADF (Bad file descriptor) [pid 5890] close(16) = -1 EBADF (Bad file descriptor) [pid 5890] close(17) = -1 EBADF (Bad file descriptor) [pid 5890] close(18) = -1 EBADF (Bad file descriptor) [pid 5890] close(19) = -1 EBADF (Bad file descriptor) [pid 5890] close(20) = -1 EBADF (Bad file descriptor) [pid 5890] close(21) = -1 EBADF (Bad file descriptor) [pid 5890] close(22) = -1 EBADF (Bad file descriptor) [pid 5890] close(23) = -1 EBADF (Bad file descriptor) [pid 5890] close(24) = -1 EBADF (Bad file descriptor) [pid 5890] close(25) = -1 EBADF (Bad file descriptor) [pid 5890] close(26) = -1 EBADF (Bad file descriptor) [pid 5890] close(27) = -1 EBADF (Bad file descriptor) [pid 5890] close(28) = -1 EBADF (Bad file descriptor) [pid 5890] close(29) = -1 EBADF (Bad file descriptor) [pid 5890] exit_group(0) = ? [pid 5890] +++ exited with 0 +++ [ 110.753233][ T5867] sched: DL replenish lagged too much [pid 5867] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 5867] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 5867] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555e4d9650) = 4 executing program ./strace-static-x86_64: Process 5891 attached [pid 5891] set_robust_list(0x55555e4d9660, 24) = 0 [pid 5891] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5891] setpgid(0, 0) = 0 [pid 5891] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5891] write(3, "1000", 4) = 4 [pid 5891] close(3) = 0 [pid 5891] read(200, 0x7ffc5c88d4c0, 1000) = -1 EAGAIN (Resource temporarily unavailable) [pid 5891] write(1, "executing program\n", 18) = 18 [pid 5891] socket(AF_NETLINK, SOCK_RAW, NETLINK_NETFILTER) = 3 [pid 5891] sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\x14\x00\x00\x00\x10\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x0a\x20\x00\x00\x00\x00\x0a\x01\x03\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\xff\xfd\x09\x00\x01\x00\x73\x79\x7a\x30\x00\x00\x00\x00\x40\x00\x00\x00\x03\x0a\x01\x02\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x09\x00\x03\x00\x73\x79\x7a\x32\x00\x00\x00\x00\x14\x00\x04\x80\x08\x00\x02\x40\x32\x65\x8a\xeb\x08\x00\x01\x40"..., iov_len=204}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0 [pid 5867] kill(-4, SIGKILL) = 0 [pid 5867] kill(4, SIGKILL) = 0 [pid 5891] <... sendmsg resumed>) = ? [pid 5891] +++ killed by SIGKILL +++ [pid 5867] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=4, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=1 /* 0.01 s */} --- [pid 5867] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555e4d9650) = 5 ./strace-static-x86_64: Process 5895 attached [pid 5867] kill(-5, SIGKILL) = -1 ESRCH (No such process) [pid 5867] kill(5, SIGKILL) = 0 [pid 5895] +++ killed by SIGKILL +++ [pid 5867] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=0} --- [ 308.718599][ T31] INFO: task kworker/1:3:983 blocked for more than 152 seconds. [ 308.762412][ T31] Not tainted 6.16.0-syzkaller-12063-g37816488247d #0 [ 313.387554][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 313.433475][ T31] task:kworker/1:3 state:D stack:25000 pid:983 tgid:983 ppid:2 task_flags:0x4208060 flags:0x00004000